|Publication number||US6965794 B2|
|Application number||US 10/119,979|
|Publication date||Nov 15, 2005|
|Filing date||Apr 10, 2002|
|Priority date||Oct 5, 2001|
|Also published as||US20030069514|
|Publication number||10119979, 119979, US 6965794 B2, US 6965794B2, US-B2-6965794, US6965794 B2, US6965794B2|
|Inventors||Lee Richard Brody|
|Original Assignee||Fasstech, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (6), Referenced by (42), Classifications (5), Legal Events (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present application claims the benefit of U.S. Provisional Patent Application Ser. No. 60/327,324, which was filed on Oct. 5, 2001, by Lee Richard Brody for a APPARATUS FOR ROUTING ELECTROMYOGRAPHY SIGNALS and is hereby incorporated by reference.
1. Field of the Invention
The invention relates generally to systems for monitoring electromyography signals.
2. Background Information
Electromyography (EMG) signals are bioelectric signals that are generated during muscle contraction, and the energy of the EMG signals is proportional to muscle tone. Chiropractors and other healthcare clinicians currently monitor surface EMG signals to evaluate paraspinal muscle tone. Each EMG signal is detected using a detection electrode array that is held on the skin above the muscle.
The known prior detection electrode arrays are hand-held devices that include two differential electrodes. A ground electrode may also be included in the array or, alternatively, the ground electrode may be attached separately to the patient's body. The differential electrodes are electrically connected to EMG amplifiers that are included in monitoring instrumentation. The EMG amplifiers operate in a known manner to amplify, filter, process and convert the EMG signals into signals that can be further processed, for example, by a personal computer. The EMG amplifiers, which manipulate signals that are in the 1 to 25 millionth of a volt range, are relatively complex, and thus, expensive. The monitoring instrumentation typically includes either two or four EMG amplifiers. Two amplifiers are required for the “mapping” of muscle tone along the spine, while other measurement protocols may utilize all four amplifiers.
A clinician performs the mapping protocol while the patient is in a particular stable posture, such as a seated neutral position. As appropriate, additional protocols may be performed with the patient in other postures. The mapping protocol involves taking surface EMG measurements from two muscle sites simultaneously, with the two arrays held respectively in position on either side of the spine at particular spinal levels. The two EMG measurements are taken at a given position after the signals stabilize at the EMG amplifiers. Thereafter, the clinician moves the two arrays to a next spinal level and records the EMG signals on either side of the spine, and so forth, until measurements are taken at typically between fifteen and twenty-five spinal levels.
The accuracy of the bi-lateral muscle tone measurements depends, in large part, on the skill of the clinician. First, the clinician must hold the arrays above the appropriate muscles and in the appropriate positions relative to the spine. Further, the clinician must place the arrays in place long enough for the signals to stabilize before the measurements are taken. Also, the clinician must make sure that the patient remains in a desired posture throughout the relatively time consuming process of repeatedly placing the arrays against the body, taking the measurements, and moving the arrays to a next location, and so forth. If the measurements must be repeated with additional postures, the clinician must accurately repeat the entire process. For patients with painful back or spinal conditions, the protocol may be inconvenient, if not impossible, to complete because the patient may not be able to remain in a desired posture throughout the time-consuming process.
An EMG monitoring system includes a matrix of detection electrode arrays that is positioned on the patient along his or her spine. The arrays are electrically connected through a switching mechanism to EMG amplifiers that are included in conventional monitoring instrumentation. A switch controller operates the switches to provide signals to the EMG amplifiers from selected sets of detection electrode arrays. Measurements can thus be taken along the entire spine without having to reposition the electrode arrays.
The controller controls the switches to provide signals simultaneously to each EMG amplifier. If the monitoring instrumentation includes four EMG amplifiers, the matrix of electrode arrays and the switching mechanism may be used to take simultaneous measurements at two different spinal levels. If additional EMG amplifiers are included, simultaneous measurements at additional spinal levels may also be made.
The matrix of arrays and the lines electrically connecting the arrays to the switching mechanism may be contained in two adhesive strips, such that the matrix remains in place, regardless of changes in posture. Alternatively, the matrix and connecting lines may be housed in a re-usable pad that is attached to the patient with a two-sided medical-grade adhesive sheet. The sheet has holes which are strategically located relative to the electrodes, to hold the electrodes in contact with the patient.
The matrix may include redundant arrays and/or electrodes, such that the clinician can select sets of electrodes that conform to the size of the patient. For example, the clinician may use adjacent arrays and adjacent electrodes within the respective arrays for the smallest patients. For somewhat larger patients, the clinician may use adjacent arrays and non-adjacent electrodes within the respective arrays, and so forth. Thus, the same matrix may be used for various sized patients.
The invention description below refers to the accompanying drawings, of which:
As depicted in
The switching mechanism 30, which may include individual switches, multiplexors, and so forth, operates under the control of a switch controller 34 and supplies the signals from selected arrays 12 to the EMG amplifiers 42. If, for example, the clinical protocol requires measurements to be taken along the entire spine, the switch controller 34 operates the switching mechanism 30 to pass the signals from the first array 12 in each strip 20, that is, from the arrays at the top of the spine, to one pair of the EMG amplifiers 42 and the signals from the second arrays 12 in each strip to the second pair of EMG amplifiers. The monitoring instrumentation 40 then takes measurements when the signals provided to the EMG amplifiers 42 stabilize. The switch controller 34 next controls the switching mechanism 30 to supply the signals from the next two arrays 12 in each strip to the EMG amplifiers 42, and so forth, until measurements from all of the arrays have been taken. The protocol measurements are thus taken relatively quickly, since the individual arrays do not have to be repositioned between measurements.
If the protocol requires that measurements are to be taken with another posture, the clinician instructs the patient to move to the new posture while the matrix 10 remains in place. The signals from the appropriate arrays 12 are then supplied to the monitoring instrumentation 40 in the same manner as discussed above. Alternatively, the protocol may require that only selected measurements be made in the new posture, and the switching mechanism 34 provides the signals from the appropriate arrays 12 to the instrumentation 40. The protocols can be performed as soon as the patient is settled in the new posture, since the matrix 10 remains in position on the patient's body as he or she moves to the new posture.
The switch controller 34 may be pre-programmed to perform the protocols. Alternatively, or in addition, the clinician may provide instructions for the different protocols or variations thereof. For example, the clinician may determine that the measurements taken along certain portions of the spine should be repeated, based on the results of earlier measurements. The clinician then provides the appropriate instructions to the switch controller 30, and the repeat measurements can be readily taken when the switches again supply the signals from the appropriate arrays 12 to the EMG amplifiers 42. Using prior systems, the clinician would instead have to reposition the arrays in each of the selected locations to take the additional measurements.
Aside from increasing the speed with which the various protocols can be performed, the matrix 10 ensures greater accuracy of the measurements. Using the matrix, the clinician places the arrays in the correct positions along the spine for the individual measurements. Further, the arrays remain in the same positions while measurements for different protocols or repeat measurements for the same protocol are taken, and the measurements can thus be reliably compared. This is in contrast to known prior systems in which hand-held arrays are repositioned for each measurement, and may thus be inaccurately placed for some of the measurements, and/or placed in different relative positions for repeat measurements.
The strips 20 and the electrodes 14 included therein are disposable. The matrix 10 is sized differently for infants, children and adults. The vertical distances between the individual arrays in, for example, the infant-sized matrix, are relatively small while the vertical distances for the other sizes of matrix are proportionately larger. Further, the horizontal distances between the individual electrodes in the arrays are smaller for the infant-sized matrix. Within a given matrix, however, the vertical and horizontal distances between the individual arrays and the individual electrodes are constant. A ground electrode (not shown) may be included in one or both of the strips 20. Alternatively, the ground electrode may be attached separately to the patient's body.
Referring now to
Referring now to
Further, as depicted in
As discussed, the matrix may include electrodes that are spaced to correspond to specific sizes of patients, and various sizes of matrices may be used. Alternatively, one size matrix may be used, with the switching mechanism selecting specific electrodes for use based on the sizes of the respective patients. However, for a given patient, the matrix is held in a desired position relative to the spine, and required measurements can be taken in the various postures using the switching mechanism without having to re-position any of the electrode arrays.
As also discussed, redundant electrodes may be included in the various arrays, such that the switch controller not only selects particular arrays but also electrodes within the arrays. Further, the redundant electrodes may be included in every array or in particular arrays, as appropriate.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US5096669 *||Sep 15, 1988||Mar 17, 1992||I-Stat Corporation||Disposable sensing device for real time fluid analysis|
|US5483967 *||Dec 2, 1993||Jan 16, 1996||Ohtake; Tutomu||Bioelectric signal recording device|
|US6002957 *||Apr 14, 1998||Dec 14, 1999||Paraspinal Diagnostic Corporation||EMG electrode array support belt|
|US6463322 *||Apr 10, 2001||Oct 8, 2002||Viasys Healthcare, Inc.||Combination referential and differential amplifier for medical signal monitoring|
|US6560479 *||Jan 17, 2001||May 6, 2003||Viasys Healthcare Inc.||Electrode disconnect system and method for medical signal monitoring system|
|US20040054273 *||Aug 15, 2003||Mar 18, 2004||Advanced Imaging Systems, Inc.||EMG electrode apparatus and positioning system|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US8032210||Oct 5, 2006||Oct 4, 2011||Spinematrix, Inc.||EMG diagnostic system and method|
|US8117047||Apr 16, 2007||Feb 14, 2012||Insight Diagnostics Inc.||Healthcare provider organization|
|US8323188||Dec 26, 2011||Dec 4, 2012||Bao Tran||Health monitoring appliance|
|US8323189||Jun 4, 2012||Dec 4, 2012||Bao Tran||Health monitoring appliance|
|US8328718||Dec 26, 2011||Dec 11, 2012||Bao Tran||Health monitoring appliance|
|US8425415||Jun 6, 2012||Apr 23, 2013||Bao Tran||Health monitoring appliance|
|US8449471||Dec 26, 2011||May 28, 2013||Bao Tran||Health monitoring appliance|
|US8461988||Dec 28, 2011||Jun 11, 2013||Bao Tran||Personal emergency response (PER) system|
|US8475368||Nov 14, 2012||Jul 2, 2013||Bao Tran||Health monitoring appliance|
|US8500636||Nov 14, 2012||Aug 6, 2013||Bao Tran||Health monitoring appliance|
|US8525673||Apr 29, 2010||Sep 3, 2013||Bao Tran||Personal emergency response appliance|
|US8525687||Sep 14, 2012||Sep 3, 2013||Bao Tran||Personal emergency response (PER) system|
|US8531291||Dec 28, 2011||Sep 10, 2013||Bao Tran||Personal emergency response (PER) system|
|US8628020||Oct 22, 2008||Jan 14, 2014||Hmicro, Inc.||Flexible wireless patch for physiological monitoring and methods of manufacturing the same|
|US8652038||Feb 22, 2013||Feb 18, 2014||Bao Tran||Health monitoring appliance|
|US8684900||Nov 29, 2012||Apr 1, 2014||Bao Tran||Health monitoring appliance|
|US8684922||Dec 7, 2012||Apr 1, 2014||Bao Tran||Health monitoring system|
|US8708903||Mar 11, 2013||Apr 29, 2014||Bao Tran||Patient monitoring appliance|
|US8718742 *||May 23, 2008||May 6, 2014||Hmicro, Inc.||Integrated wireless patch for physiological monitoring|
|US8727978||Feb 19, 2013||May 20, 2014||Bao Tran||Health monitoring appliance|
|US8747313||Jan 6, 2014||Jun 10, 2014||Bao Tran||Health monitoring appliance|
|US8747336||Mar 9, 2013||Jun 10, 2014||Bao Tran||Personal emergency response (PER) system|
|US8750971||Aug 2, 2007||Jun 10, 2014||Bao Tran||Wireless stroke monitoring|
|US8764651||Apr 8, 2013||Jul 1, 2014||Bao Tran||Fitness monitoring|
|US8968195||Jun 6, 2013||Mar 3, 2015||Bao Tran||Health monitoring appliance|
|US9028405||Jan 25, 2014||May 12, 2015||Bao Tran||Personal monitoring system|
|US9060683||Mar 17, 2013||Jun 23, 2015||Bao Tran||Mobile wireless appliance|
|US9095267||Dec 21, 2012||Aug 4, 2015||Modular Bionics Inc.||Neural interface device and insertion tools|
|US9107586||May 16, 2014||Aug 18, 2015||Empire Ip Llc||Fitness monitoring|
|US9107627 *||Sep 21, 2011||Aug 18, 2015||Alexander B Grey||Method for assessing and optimizing muscular performance including a muscleprint protocol|
|US9204796||Jul 27, 2013||Dec 8, 2015||Empire Ip Llc||Personal emergency response (PER) system|
|US9215980||Apr 23, 2014||Dec 22, 2015||Empire Ip Llc||Health monitoring appliance|
|US9265435||Oct 21, 2008||Feb 23, 2016||Hmicro, Inc.||Multi-electrode sensing patch for long-term physiological monitoring with swappable electronics, radio and battery, and methods of use|
|US9351640||Nov 4, 2013||May 31, 2016||Koninklijke Philips N.V.||Personal emergency response (PER) system|
|US9549691||Apr 23, 2014||Jan 24, 2017||Bao Tran||Wireless monitoring|
|US20070167859 *||Oct 5, 2006||Jul 19, 2007||Finneran Mark T||EMG Diagnostic System and Method|
|US20080221422 *||Mar 8, 2007||Sep 11, 2008||General Electric Company||Sensor measurement system having a modular electrode array and method therefor|
|US20100317958 *||May 23, 2008||Dec 16, 2010||James Beck||Integrated wireless patch for physiological monitoring|
|US20110028822 *||Oct 21, 2008||Feb 3, 2011||Beck James C||Multi-electrode sensing patch for long-term physiological monitoring with swappable electronics, radio and battery, and methods of use|
|US20110062241 *||Oct 22, 2008||Mar 17, 2011||Beck James C||flexible wireless patch for physiological monitoring and methods of manufacturing the same|
|US20140257129 *||Oct 22, 2013||Sep 11, 2014||Samsung Electronics Co., Ltd.||Sensor system and method of operating the same|
|DE102011116051A1||Oct 17, 2011||Apr 18, 2013||Oliver Bartels||Device for measuring ECG signal in human body, has electric or electronic switches that switch component between two electrodes according to electronically controllable impedance|
|U.S. Classification||600/546, 600/393|
|Apr 10, 2002||AS||Assignment|
Owner name: FASSTECH, INC., MASSACHUSETTS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BRODY, LEE RICHARD;REEL/FRAME:012787/0262
Effective date: 20020401
|May 25, 2009||REMI||Maintenance fee reminder mailed|
|Jun 16, 2009||FPAY||Fee payment|
Year of fee payment: 4
|Jun 16, 2009||SULP||Surcharge for late payment|
|Jun 28, 2013||REMI||Maintenance fee reminder mailed|
|Nov 15, 2013||LAPS||Lapse for failure to pay maintenance fees|
|Jan 7, 2014||FP||Expired due to failure to pay maintenance fee|
Effective date: 20131115